East Atrium

East Atrium is the room connecting Gathering Hall and Energy Core Access.

Any%

Jumping, then letting loose a charged shot at the Shriekbats, followed by a full L-jump or R-jump is the fastest known method of traversing the room.

Leaving after Incinerator Drone: Rolling through the room has been the default strategy, unmorphing after hitting the bump in the floor near the Gathering Hall end of the room. R-jumping has been theorized to be faster because of the reduction in animation wait time from unmorphing.

For a non-IBBF route which involves entering this room with Boost Ball, this video should demonstrate the best known method of progressing. It should be noted that an Instant Unmorph is possible with the boosting method, but very inconsistent and unknown as to how the camera becomes stuck.